<!DOCTYPE html>
<html lang="en">
<head>
    <meta http-equiv="Content-Type" content="text/html" charset="UTF-8">
    <title>Authentication</title>
</head>
<body>
    <div style="text-align: center; font-family: sans-serif; margin-top: 20px;">
        <h3>Authentication Successful</h3>
        <i>Please close the page.</i>
    </div>
</body>
</html>